15-Letter Words Matching _____I_O_______

There are 16 15-letter words that match _____I_O_______. 2 are common words, such as GRANDILOQUENCES and SANCTIMONIOUSLY. A rarer one is VENTRILOQUIZING. 2 words contain a doubled letter.

Full list 16

grandiloquencessanctimoniouslygrandiloquentlyunequivocalnesskremlinologistsnonphilosophersnonuniformitiesparasitologicalparasitologistsreinvigorationssigmoidoscopiessteroidogenesessteroidogenesisventriloquiallyventriloquisticventriloquizing

About this list

Words
16 (2 common words)
Common example
grandiloquences
Rare example
ventriloquizing
Doubled letters
2
Ending in S
10

Questions

How many 15-letter words matching _____i_o_______ are there?

16. 2 of them are common words.

What is a common example?

GRANDILOQUENCES is among the common words in this set.